%0 Journal Article %A I. M. Spitkovsky %T On a vectorial Riemann boundary value problem with infinite defect numbers, and related factorization of matrix-valued functions %J Sbornik. Mathematics %D 1989 %P 521-538 %V 63 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1989_63_2_a16/ %G en %F SM_1989_63_2_a16